High-pressure pump



July 2, 1929. J. c. HULL 1.719.373

HIGH PRESSURE PUMP Filed Dec. 4, 1926 3 Sheets-Sheet 1 H Jamar/Fuzz My L 1 1929.

J. c. HULL HIGH PRESSURE PUMP Filed Dec. 4, 1926 5 Sheets-Sheet amnion Jab; aflull Patented July 2, 19 29; i g 1 UNITED STATES.

PATENT orr ca."

JOHN c. sum LOCKPOBT, NEW YORK.

nIen-rnnssuan rtmr.

Application filed December 4, 1820. Serial No. am.

The present invention relates to a novel motor-pump unit and. to an improved pump construction and desi n. The pump is of the general type employed in spraym g o erations and is so constructed and desi ne for this purpose as to enable it to supp nitely maintain the requisite high pressure. It is characterized by its simplicity of design, rugged construction, the logical and compact arrangement and assembly of its component parts and units and the extreme facility with which it can be adjusted and repaired. The motor-pump combination is characterized by the absence of-vibration, the elimination of transmission troubles and by mutual'co-operation whereby each enhances theoperating efficiency of the other. These and other characteristics of theinvention will be more particularly set forth in the following statement of the objects of the invention and in the specification.

It is an ob ect of the invention to provide a pump capable of maintaining a stead even flow at high pressure under all conditlons of use and which may be adjusted while so functioning, to compensate for wear, thus maintaining'its efficiency.

A further object of the invention is to rovide a combinedmotor-pump unit in w ich all stresses are confined within such unit and where the motor and pump otherwlse contribute, each to the efficiency of the other.

It is a further object of the invention to construct a pump of a plurality of substan-' tially complete units, each of novel design and to so assemble such units as to render each of them readily accessible for ins ection, removal and repair without distur ing the remainingunits.

A still further object of the invention relates to the novel disposition and arrangei'nent of the packing for the pump plungers' and to the provision of external means for adjusting the enclosed packing gland while the pump is operating at high pressure.

Another object of the invention relates to the novel construction and arrangement of the several check valves and to the means for manually correcting possible faulty opera tions, such as sticking of the valves, while the pump is in operation.

Other objects and advantages of the invention, some of which are incidental to the foregoing, will appear in connection with the detailed description of the structure illustrated in the accompanying drawings.

, Fig. 1 is anend elevation of a motorump unit constructed in accordancewith my lnvention.

Fig.2 is a-view in elevation of the opposite end of the structure shown in Fig. 1.

unit ofFigs. 1 and 2. Fig. 4 IS a vertical section 4-4 of Fig. 1. a i

Fig. '5 is a vertical section'o'n line 5 -5 of Fig. 3 is a side elevation of the motor-pump 7 taken on line. i

Fi .4. a

fieferring now to Fig. 1' of the drawings,

it will be seen that the motor-pump unit comprises a motor or engine 1 of substantially conventional design. As herein shown the motor is of the stationary ty e'having a cast body and base portion 2, in w ich journals are rovided for the usual cra'nk-shaft 3. The

ody casting of the motor is provided with a; pair of vertical faced flanges 9 integral there with which co-operate with corresponding flanges 10 of the pump 7. Bolts 11 are em plolyed for securing the flanges 9 and '10 toget er. It is evident from the structure thus far described that the pump is secured to and and the bearing ring 13 is located a plurality of suitable anti-friction elements, such as balls, rollers or the like. The crank pin and its associatedbearing ring co-act with hard ened wear resisting'plates 16 secured to the pump yoke 15, thus impartinga reciprocatory movement to the pump'plungers which are connected to the yoke 15.

The pump structure will now be described with particular reference to Fig. 4 of the drawings. It is apparent from an inspection of this figure that duplicate pumps and plun ers are provided in aligned and oppose relation and also that the suction and discharge connections are likewise in duplicate. For this reason the description will be confined to one end only of the pump, it being-understood that the same is-likewise applicable to the structure at the oppositeend. The plunger construction com rises a tubular member 18 seated at one en upon an annular ledge formed on the projection 22 of the yoke 15 and at its other end is closed by a piston head 19 providing a similar annular ledge for the reception of the tubular member. Abolt 20, asses through the head 19 and has threaded engagement as at 21 with the projection 22, whereby the parts of the plunger are held in assembled relation. The plun er operates within a cylinder casting 23 within which is arran ed a suitable piston packing 24. The cylin er casting 23 is provided with radial lugs or bosses 49 for the reception ofthreaded bolts 29. The cylinder chamber is closed by a cylinder cup 28 arranged with its 0 n edge in abutting relation with the cylin or casting and secured in this relationthrough the instrumentality. of the afore-mentioned bolts 29 which pass throu h apertured bosses on the c linder cu %t is essential that some means e provided for adjusting the packing 24 in order to compensate for wear and to this end a packing land 25 -is provided within the chamber ormed by the cylinder casting and cylinder cup. The packing gland is of tubular form and of a diameter to receive the plunger therein. The inner end of the packlng gland abuts against the outermost ring orla er of the packing 24, while the outer end t ereof is closed and is provided with a de ression for the reception of the end of an ad ustin' screw 26. The body of the gland is provi ed with a plurality of longitudinallyextending elongated slots for the passage of the solution therethrough. The screw 26 is threaded through the cylinder cup 28, a suitablestufiing box 27 being provided to prevent leakage. The cylinder casting 23 is provided with suction and discharge ports 51 and res ctively' which register with discharge an suction check valves 32 and 33 respectively. The suction valve 33 also re is- "ters with an opening in the suction cham er reception of bolts 35 I which pass through a ertured lugs on'the 30, while discharge valve 32 has an opening in its upper end registering with an opening in the pressure or equalizin chamber 31. The radial bosses 49 of the cy inder casting are provided with threaded apertures for the and 36 respectively discharge and suction c ambers respectively. The equalizing chamber 31 is in the form of an elon ated cylinder, closed at its ends and provid midwayof its length with a vertical cylindrical extension opening at one end into e main cylinder and having its opposite end closed. A suitable pressure indicatin device is located in the top of the vertica cylindrical portion. The outlet or discharge opening 44 of the air chamber may be connected directly to the spray hose if desired, but in accordance with the present invention, the

solution is passed through intermediate connections to be hereinafterdescribed.

' The suction chamber 30,"as hereinbefore described, has openings at its opposite ends registering with the respective suction valves at opposite ends of the pump, and at a point intermediate its ends is provided with a supply connection 48. Formed integrally with the suction chamber on the upper surface thereof, is a guide lug 43 adapted to coact with a guide lug 42 on the pump yoke 15 for preventing oscillation o the yoke about the axis of the plungers and for otherwise enhancing the stability and smoothness of operation of the device.

The construction of the several check valves employed in the present pump construction as well as the relation of these valves with the cylinders and-pressure and suction chambers respectively, forms an important feature of the invention. The valves are the ball type and comprise a body portion ball seat 38, gasket 39 and ball 40. The body portion is in the form of a cage, with inwardly projecting ribs for receiving the ball and holding the same in spaced relation to the sides and top thereof. The valve seat is constructed separately in the form of a metallic washer and is adapted to be inserted between the bottom surface of the valve body and the part with which the valve is associated. In the case of the discharge valves the ball seats 38 are located between the bottom surface of the valve body and the cylinder casting while as to the suction chamber the ball seats are interposed between the valve body and such chamber.

Referring now to Figures 1, 2 and 3, it will be seen that the discharge port 44 is connected by means of a pipe 45 with the cooling hopper 8 of the engine. A separate chamber is provided Within the cooling hopper through which the discharged solution circulates and from which the solution is drawn through pipe 45'. Duplicate hose connections 46 are provided at the end'of pipe 45' for the connection of two hose lines, a shutoff valve being provided for rendering one or both of such connections inoperative. The circulacooling hopper of the engine serves the twofold purpose of maintainin the solution at i the desired temperature an also of keeping the water in the cooling hopper at a substantially even temperature.

In order to avoid inconvenience and delay caused by faulty valve operation, externally operable releasing means are provided for quickly unseating the ballvalves should they become stuck for an reason. This means is in the form of a t rust rod 37 rejecting through an aperture in the suction c amber in alignment with the valve. A suitable adjustable stufling box is provided for reventing leakagf around the rod. It willie readily seen t at by thrusting the rod inwardly its inner end will come into contact valve ball and dislodge the same from its seat. v

with the Suitable facilities may be provided for parts. In the event such a casing is provided valves are capable of removal it should be connected to or formed integral with the opposed cylinder castin s, a suitable bearing for the pum crank s aft being provided in a wall thereo Simplicity of design is perhaps the most outstanding feature of the present invention. The cylinder castings constitute the body around which the pump is assembled. The four bolts at each end of the pump structure furnish the only securing means necessary for holding the suction chamber, the ressure chamber and c linder cups in assem led relation. Attention is directed to the fact that the several valves are simply interposed between their respective cylinders and chambers and held in place by compression and without special securing means. By reason of this construction and arrangement of parts, the task of assembling or disassembling the complete pump is an extremely simple one. Moreover, all parts are readily accessible and removable for replacement or re air. The simply loosening one or two of the bolts an without disturbing the remaining parts. Access may be had to the piston packing by removal of the cylinder cup, or such pac ing may be adjusted while the pump 18 in operation by means of the end adjusting bolts.

It will be observed that the manner in which the pump and motor are secured together provldes a simple and compact motorpump of substantially unit construction. By

- reason of the pump operatin shaft and enginejcrank shaft being journa ed in the same castingand directly geared together, asubstantially vibrat-ionless transmission is af- 7 forded. This latter feature is of considerable advantage over prior constructions employ-'2 ing a pump and motor mounted on separate bases with power transmitting connections extending between them.

In describing the resent invention, use has-been made of asmgle specific structure for illustrating an embodiment thereof, but

it should be understood that many changes and variations'i'n the structure shown can be madejwithout sacrificing the advantageous features or departing from the spiritof the invention; For example, it is apparent that the present pump structure may be combined with other types of motors than that herein I shown. It should also be understood that such features of the pump as the driving cop- Having fully described the invention; and'iic pointed out the salient features thereof,'Whatv is claimed as new and desired to be secured by" Letters Patent is: I v

1.-In a device of the character described, and in combination with a motor having .5. frame and a power shaft extending transversely of said frame and journaled therein, of a pump secured directly to a side of said motor frame and driving connections from said power shaft to said pump, said connections comprising a' second shaft journaled in the frame and dis osed in parallel relation with said power sliaft, inter-meshin gears" on corresponding ends of the two sai shafts whereby to drive the second'jshaft from' the power shaft, and a drivin' jcon nectionbetween an end of the secon" shaft'and said 2. In a mechanism of the-character described, the combination of an internal combustion motor of the stationar t pe, havinga a frame casting and a crank s a t journaledtransversely thereof,-a vertical faced flange integral with said frame casting at a side thereof, a pump having a complemental flange and means for securing saidtflanges wall thereof, a multi-cylinder pump having vertical faced. flanges complemental to the aforesaid flanges, means for securing said flanges together whereby to support the pump on the motor, a second shaft journaled in said frame casting and having geared connection with said crank shaft, and means for operating said pump from said second mentioned shaft. p

4. In a mechanism of the character described, a combined having means for driving the former-from the latter, a hopper for the reception of a cooling umedium for the motor, a discharge conduit for the pum and means for producing mutual interaction between the cooling medium 1 5 and the contents of said discharge conduit.

5. In a mechanism of the character described, a combined um and motor unit having means for driving t e former from the latter, a hopper fol-the reception of a cooling x medium for the motor, means for discharging 130 ump and motor. unit.

for producing mutual interaction between the cooling medium and the. spray solution by passing onethrough the other.

,- medium mg a tron.

. horizontally plungers nectin the .6. Int sprayingequipment, the combinationfof amotor, a spray pump, means fordriving said pump from said motor, a cooling for said motor, means for dischargipray solution from said pump, and

or bringing said cooling medium and solution into heat transferring relameans spray 7. In a spray pump construction, ended cylinder casting, end of said casting, a cylinder cup abutting and secured to said flange, a pressure chamh r, a valve interposed between said cylinder and said chamber, and means secured to said chamber and said flange for clamping said valve in place and holdin said cyllnder, chamber, and valve in assem led relation. 8. In a device of the character described, opposed cylinders, opposed within said cylinders, a yoke con- .s'aid plungers, means for operating yo e asuctio'n chamber communicating with eac of said cylinders, a guide on said an open a radial flange at one suction chamber, and a co-operating guide lug on said yoke, whereby movements of the 30.

yoke and connected plungers may be effectively guided and oscillatory movement of the yoke prevented. A

9'. Ina device of the class described, a cylinder having suction and discharge ports therein, suction and pressure chambers having with the suction and disports registering charge ports "respectively of said cylinder,

' means for drawing the said chambers towards said cylinder, 4.0

and check valves interposed between the respective chambers and cylinder and in alignment with the said ports, said check valves being held in position solely by .cooling me compression.

10. In a machine of the class described, the combination with an engine of the stationary type havin a hopper for the reception of a ium for the cooling system of the engine, of a, spray pump mounted on and packing elements disposed in said driven by said engine, and means associated with said pump and'hopper for assin the spray solution from said pump t roug the cooling medium in said hopper, whereby to bring the spray solution to' the desired temperature and to keep the cooling medium at a Substantially even temperature.

11. A pump structure comprising a body portion consisting of a cylindrical packing chamber, anannular chamber having inlet and discharge openings therein, and a radial end flange; a cylinder adapted to be detach-' ably secured to said end flange and having communication with said annular chamber, packin chamber, and a piston reciprocable in sai cylinder.

communication with said annular chamber,

packing elements dis osed in said packing chamber, a cylindrica shell of skeleton form concentrically disposed within said cylinder, one end of said shell abutting the said packin elements, means extending through said cy inder and adapted to engage the opposite end of said -shell for adjusting the same and a piston rciprocable in said cylinder.

13'. A pump structure comprisin a casing formnig the body of said pump an to which the remaining elements of the pump are adapted to be detachably secured, said body being formed with a acking chamber, a fluid chamber having inlet and exhaust ports and a radial end flange; a cylinder adapted to be detachably secured to said flange in axial alignment with said packing chamber, and a piston reciprocable in said packing chamber and cylinder.

14. A pump structure comprisin a casin forming thebody of said pump and to whic the remaining elements of the pum are adapted to be detachabl secured, sai body being formed with a packing chamber, a fluid chamber having inlet and exhaust ports and a radial end flange; a cylinder adapted to be detachably secured to said flange in axial alignment with said packing chamber, supply and dischargemanifolds associated with said pump body, check valve units interposed between said body and said manifolds, means associated with the respective manifolds and engageable with the aforesaid, a flange for drawing the said manifolds toward said body, thereby holding said valve units in place, and a piston reciprocable in said packing chamber and cylinder.

15. A pump structure comprising a casing forming the body of said pump and to which the remaining elements of the pump are adapted to be detachably secured, said body 'consisting of an elongated sleeve having one end formed with an inwardly directed flange, an outer annular wall secured to but radially spaced from said sleeve, forming therewith an annular fluid chamber, said outer wall extending longitudinally beyond the adjacent end of said sleeve and having formed on its free'end a radial flange, said outer wall having inlet and discharge ports formed therein for placing said fluid chamber in communi cation with a source of fluid supply and a receiving chamber; a cylinder adapted to be detachably secured to the radial face of said last-mentioned flange; annuular packing elements disposed within said sleeve, means for compressing said acking elements and a piston reciprocable in said cylinder and engaged same in operative communication, and means by said packing elements. associated with the respective manifolds and 16. A pump of substantially the character engageable with said last mentioned flange defined in claim 15, in combination with supfor clamping said Bump, manifolds, and

5 ply and discharge manifolds associated therccheck valves in assem led relation.

with, check valves interposed between and In testimony whereof I affix my signature. directly engageable with the respective manifolds and the pump structure for placing the JOHN C. HULL. 

